package com.example.hp.zyfypt411sy.fragment;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.example.hp.zyfypt411sy.R;
import com.example.hp.zyfypt411sy.adapter.ProjectAdapter;
import com.example.hp.zyfypt411sy.bean.ProjectBean;
import com.example.hp.zyfypt411sy.iface.ProjectListener;
import com.example.hp.zyfypt411sy.model.ProjectModel;

import java.util.List;

import static android.content.Context.MODE_PRIVATE;

/**
 * Created by Mac on 2017/4/9.
 */

public class Fragment5 extends Fragment {
    private  TextView tvinfo;
    private View view=null;
    private Context context;
    private RecyclerView recyclerView;
    //private RecyclerView.LayoutManager layoutManager;//显示布局效果
    private ProjectAdapter projectAdapter;
    private List<ProjectBean> list=null;

    private SharedPreferences sp;
    private String sessionid;

    private int page=1; // 代表页数，并初始化为1，代表第1页。
    private int lastVisibleItemPosition;//最后一条可见条目的位置
    private LinearLayoutManager layoutManager;//显示布局效果

    ProjectListener projectListener=new ProjectListener() {
        @Override
        public void onResponse(List<ProjectBean> beanlist) {
            if (page==1) {
                list = beanlist;//得到网络数据
            }
            else {
                list.removeAll(beanlist);
                list.addAll(beanlist);
            }
            projectAdapter.setList(list);//传给adapter
            projectAdapter.notifyDataSetChanged();//通知更新
        }
        @Override
        public void onFail(String msg) {
            Toast.makeText(context,msg, Toast.LENGTH_SHORT).show();
        }
    };
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        context=getActivity();
        //动态加载Fragment1的布局文件
        view=inflater.inflate(R.layout.fragment5,container,false);
        //获取布局上的控件，注意通过view获取
        tvinfo=(TextView)view.findViewById(R.id.textView8);
        tvinfo.setText("项目");
        //注意Toast第一个参数上下文
        Toast.makeText(context, "加载Fragment项目", Toast.LENGTH_SHORT).show();
        //读取sp
        sp=context.getSharedPreferences("login",MODE_PRIVATE);
        readSP();
        //返回动态生成的view
        initRecyclerView();
        ProjectModel projectModel=new ProjectModel();
        projectModel.getResultList(
                "project",page,
                sessionid,
                projectListener
        );
        return view;
    }

    private void readSP() {
        sessionid = sp.getString("sessionid", null);
    }

    private void initRecyclerView() {
        //获取RecyclerView,设置属性，获取数据源，绑定
        recyclerView=(RecyclerView)view.findViewById(R.id.recyclerview);
        //创建默认的线性布局
        layoutManager=new LinearLayoutManager(context);
        //设置布局管理器
        recyclerView.setLayoutManager(layoutManager);
        //固定每个item高度，提高性能
        recyclerView.setHasFixedSize(true);
        projectAdapter=new ProjectAdapter(context);
        projectAdapter.setList(list);
        recyclerView.setAdapter(projectAdapter);
        //以下为新增内容
        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                if (newState == RecyclerView.SCROLL_STATE_IDLE && lastVisibleItemPosition + 1 == list.size()) {
                    page += 1;
                    //再次实例化ArticleModel，调用方法获取网络数据，请求新一页数据
                    ProjectModel projectModel = new ProjectModel();
                    projectModel.getResultList("project",page,sessionid,projectListener);
                }
            }
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                lastVisibleItemPosition=layoutManager.findLastVisibleItemPosition();//滚动结束后将赋值为可见条目中最后一条位置
            }
        });

    }
}
